By HOWARD FENDRICH
AP Tennis Writer
NEW YORK (AP) — Frances Tiafoe has ended Rafael Nadal’s 22-match winning streak at Grand Slam tournaments by beating the 22-time major champion 6-4, 4-6, 6-4, 6-3 in the U.S. Open’s fourth round. Tiafoe is a 24-year-old from Maryland who is seeded 22nd at Flushing Meadows and reached the second major quarterfinal of his career. He is the youngest American man to get that far at the U.S. Open since Andy Roddick in 2006. This surprise came a day after Nick Kyrgios eliminated No. 1 seed and defending champion Daniil Medvedev. That makes this the first U.S. Open without either of the top two seeded men reaching the quarterfinals since 2000.